drops of oil on the ground

[Gilles]

Originally Posted by alcubot

have you any idea?

Yes like 78F350 says…

First Clean everything well, then run the engine and you should be able to see the source, I guessing the AOS, or the accordion hose that connects the crank vent valve to the AOS.

Other possibility would be a leaking oil sump cover, again clean everything first…

PS: Use a can (or two) of engine degreaser and hose it off with "LOW pressure water" and you will be surprised of the results (tip: if you first hose down the floor, all the gunk from the engine will not stick to the floor and you should be able to hose it down easily afterwards